Description

Sodium Hydrogen 4-Amino-5-Hydroxynaphthalene-1,7-Disulphonate is a high-purity, water-soluble aromatic intermediate of significant industrial importance. Its core value lies in its bifunctional chemical structure, serving as a versatile building block for the synthesis of complex dyes and pigments. This compound is essential for manufacturers in the colorant industry seeking to produce vivid and stable hues. Its consistent quality ensures reliable performance in demanding chemical synthesis processes.

Application

• Primary Intermediate for Azo Dyes and Pigments: A key precursor in the synthesis of acid dyes, direct dyes, and reactive dyes used for textiles (cotton, wool, nylon), leather, and paper.
• Coupling Agent in Color Chemistry: Used in diazotization and coupling reactions to create a wide spectrum of red, violet, blue, and black shades with good light and wash fastness.
• Specialty Chemical Synthesis: Serves as a starting material or intermediate for the production of more complex naphthalene-based chemicals, including optical brighteners and fluorescent markers.
• Research & Development: Utilized in academic and industrial R&D labs for developing novel chromophores and functional materials.
• Potential Use in Analytical Reagents: May be employed in the formulation of specific chemical indicators or reagents due to its distinct color-forming properties.

Basic Information

Product Name	Sodium Hydrogen 4-Amino-5-Hydroxynaphthalene-1,7-Disulphonate
CAS No.	40492-14-6
Molecular Formula	C10H8NNaO7S2
Molecular Weight	349.29 g/mol
Synonyms	4-Amino-5-hydroxy-1,7-naphthalenedisulfonic acid monosodium salt; 1,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, monosodium salt; 6-Amino-5-hydroxynaphthalene-1,3-disulfonic acid sodium salt; Sodium 4-amino-5-hydroxynaphthalene-1,7-disulfonate; H-acid monosodium salt; Amino J acid monosodium salt; Contact for details on additional trade names.
EINECS	254-940-5

Quality Control

Our Sodium Hydrogen 4-Amino-5-Hydroxynaphthalene-1,7-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and consistency for your production needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light gray powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Sulfate Ash	≤ 30.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.